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A Study to Evaluate the Safety, Tolerability, and Immunogenicity of Combined Modified RNA Vaccine Candidates Against COVID-19 and Influenza

NCT05596734 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 1019

Last updated 2025-07-23

Study results available
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Summary

Substudy A: This is a Phase 1 randomized, open-label study to describe the safety and immunogenicity of up to 3 dose- level combinations of modRNA quadrivalent influenza vaccine (qIRV (22/23)) and bivalent BNT162b2 (original/Omi BA.4/BA.5). Participants will receive either:

* qIRV (22/23)/bivalent BNT162b2 (original/Omi BA.4/BA.5), at 1 of the 3 dose-level combinations
* qIRV (22/23) at dose level 1,
* qIRV (22/23) at dose level 2, or
* bivalent BNT162b2 (original/Omi BA.4/BA.5) at dose level 1 administered concurrently in the opposite arm to commercially licensed quadrivalent influenza vaccine (QIV).

Substudy B: This Phase 1/2 study will describe the safety, tolerability, and immunogenicity of quadrivalent influenza vaccine (qIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5), trivalent influenza vaccine (tIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5), and bivalent influenza vaccine (bIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5) when given concurrently with licensed quadrivalent influenza vaccine (QIV).

Conditions

Interventions

BIOLOGICAL

bivalent BNT162b2 (original/Omi BA.4/BA.5)

Intramuscular injection

BIOLOGICAL

qIRV (22/23)

Intramuscular injection

BIOLOGICAL

QIV

Intramuscular injection

BIOLOGICAL

bIRV

Intramuscular injection

BIOLOGICAL

tIRV

Intramuscular injection

Sponsors & Collaborators

Principal Investigators

  • Pfizer CT.gov Call Center · Pfizer

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2022-10-28
Primary Completion
2023-12-28
Completion
2023-12-28
FDA Drug
Yes

Countries

  • United States

Study Locations

More Related Trials

Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05596734 on ClinicalTrials.gov